>>The quality of life does not fall relative to Switzerland, but relative to what was before.
When you moved from a shalash to a 1 bedroom apartment - your quality of life has increased, you can think of children.
If you move from a house of 400 square meters with a servant in a 3-room apartment - the quality of life falls, at this point you don't really want to reproduce.

You have described a lower level of life. And quality of life is when you live in a house of 400 square meters with a servant, but your city has not been repairing roads for decades, a dozen murders a day that no one wants to investigate, a local chemical factory poured tons of waste into your favorite river, and so on. And at some point you decide to move to a three-bedroom apartment in a European country in a city where the last murder was in the 19th century, the roads are built on conscience, and for the spilled oil from the engine on the road the driver is exposed to a low bill to pay for the cleanup of the street. This is the improvement of quality of life.